Authorities searched 13 vehicles because drug money reportedly was moved in hidden compartments within them, the department said.

During the investigation, law enforcement agencies seized more than 30 pounds of methamphetamine, cocaine, firearms and $350,000 in cash.

Drug Enforcement Administration offices in Tacoma and Eugene led the investigation with help from the Pierce County Sheriff’s Department, Portland police, Springfield police and the West Sound Narcotics Enforcement Task Force.